| Boxplot statistics | |||||
| Variable | lower whisker | lower hinge | median | upper hinge | upper whisker |
| SMKH | 2 | 3 | 4 | 5 | 7 |
| SMKM | 1 | 3 | 3.5 | 5 | 7 |
| NSH | 5 | 7 | 8 | 9 | 11 |
| NSM | 1 | 3 | 4 | 4.5 | 6 |
| Boxplot Means | |||
| Variable | trimmed mean | unbiased SD | |
| SMKH | 4.15 | 1.461 | |
| SMKM | 3.8 | 1.642 | |
| NSH | 8.1 | 1.553 | |
| NSM | 3.65 | 1.348 | |
